Gustav jacob lesser



UNITED STATES PATENT OFFICE.

GUSTAV JACOB LESSER, OF FRANKFbRT-ON-THE-MAIN, GERMANY, ASSIGN'OR TOROBERT E. LESTER, OF NEW YORK, N. Y.

PROCESS OF COLORING GLUE.

SPECIFICATION formingpart of Letters Patent N01 276,609, dated May 1,1883.

Application filed March 29, 1883. (No specimens.)

Tocll whom it may concern:

Be it known that I, GUSTAV JACOB LES- SER, of Frankfort-on-thedllain,Germany, have invented an Improved Process of Colorin g Glue, of whichthe following is a specification.

Common black or dark glue, while possessing all the adhesive and otheressential qualities of fine colored glue, has heretofore, owing to itscolor, been confined in its use to such purposes in the arts as wherecolor was not essential.

The object of this invention is to color such glue so that it is bothrefined and tinted, and may be used for various purposes in the arts. Itwill be especially applicable in the manufacture of sizing and finishingcompounds for paper-hangings, compounds for the manufacture of elasticrolls, for glue and size compounds for finishing yarns, textile fabricsof silk, cotton, &c., for the manufacture of calcimines andwall-coverings, for glue to be used with colored woods, and for allother purposes where a fine strong colored glue is required.

Forfcoloringcom mou black or dark glue 1 take a poundand a half ofliquid extract of lead and mix it i'nto the water in which the glue hasbeen soaked, as follows: thirteen pounds of glue, sixty-three and aquarter pounds of water. I allow the glue to soak for about twenty-fourhours, when I dilute it by a slow fire, and when heated I gradually pourin one and a. half pound of the extract of leadandmix it well together.

sanie may be varied to some extent without departing from my invention.

Having thus described my invention, what I claim isi l, The improvedcolored glue herein de scribed, composed of common glue and a leadcouipound, substantially as described.

2. The combination of a solution of glue with liquid extract of lead,substantially as described.

6. The process of coloring glue and gelatine herein described bytreating a solution of glue or ,glatine with a lead solution, asdescribed. In witness whereof I have hereunto set my hand.

GUSTAV JAGOB'LESSER.

Witnesses:

F. VOGELER, J. GR-UND. r

